Research Article Adv. Mat. Lett. 2011, 2(2), 106-112 ADVANCED MATERIALS Letters Adv. Mat. Lett. 2011, 2(2), 106-112 Copyright © 2011 VBRI press. www.vbripress.com, www.amlett.com, DOI: 10.5185/amlett.2010.12189 Published online by the VBRI press in 2011 High temperature tensile properties of 2D cross- ply carbon-carbon composites S.R. Dhakate 1* , T. Aoki 2 , T. Ogasawara 2 1 Carbon Technology Unit, Engineering Materials Division, National Physical Laboratory, Dr. K.S. Krishnan Marg, New Delhi 110012, India 2 Advanced Composites Evaluation Technology Centre, Japan Aerospace Exploration Agency, Ohsawa, Mitaka, Tokyo 181-0015, Japan * Corresponding author. Tel: (+91) 11 45608257; Fax: (+91) 11 45609310; E-mail: [email protected] Received: 7 Dec 2010, Revised: 6 Jan 2011 and Accepted: 10 Jan 2011 ABSTRACT High temperature tensile properties of 2D carbon-carbon composite made from high strength T700 carbon fibers were evaluated at different temperatures. Carbon-carbon composites were heat treated at different temperatures i.e., 750, 1000, 1500, 2000, 2500 °C and their tensile properties were measured at room temperature and at different high temperatures. It is observed that, maximum value of tensile strength at room temperature is of composite heat treated at 1500 °C thereafter strength decreases with increasing processing temperature up to 2500 °C. The decreases in strength are related to degradation of fiber properties in composites and in-situ damage. On the other hand, tensile strength is higher at high temperature compared to room temperature. It increases progressively with increasing the test temperature up to 2000 °C. Thereafter, strength decreases and ultimate value of tensile strength is less than that of the room temperature value of 2500 °C heat treated composites. Increase in strength up to 1500 °C is due to the improvement in fiber-matrix interactions, matrix properties due to relaxation of thermally induced stresses during high temperature test. Above 1500 °C enhancement in tensile strength is due to the enhancement in strength of carbon fibers and due to the creep deformation. Decrease in strength at measurement temperature 2500 °C is due to the additional in- situ degradation of fiber properties during high temperature test. Copyright © 2011 VBRI press. Keywords: Carbon/carbon composites; high temperature; tensile properties. Sanjay R Dhakate is scientist working at National Physical Laboratory, New Delhi (India) from 1992. He did his Ph.D. from Delhi university. His research interests mainly on carbon materials i.e. Carbon fibers, Carbon –Carbon composites, Carbon nanotubes, graphene synthesis by exfoliation of graphite, Nanoribbons by unzipping CNTs, continuous polymer and carbon nanofibers by electrospinning, Development of carbon based PEM fuel cell components. He is a receipt of JSPS and JICA fellowship. Recently he has been selected for Advanced Materials Letters Scientist award 2010. Toshio Ogasawara is a senior researcher of Japan Aerospace Exploration Agency (JAXA). He received his B.S (1985), M.S. (1987), and Dr. Eng. (1994) in materials science from Tokyo Institute of Technology. He worked at Nissan Motor Co. Ltd., from 1987 to 1998, and joined JAXA (former National Aerospace Laboratory of Japan) in 1998. He has worked for research and development of high température polymer matrix composites, carbon / carbon composites, ceramic matrix composites, and carbon nanotube based composites. Takuya Aoki is a senior researcher of Japan Aerospace Exploration Agency (JAXA). He received his B.S (1996), M.S. (1998), and Dr. Eng. (2001) in materials science from Tokyo University of Science. He joined JAXA (former National Aerospace Laboratory of Japan) in 2001. He has worked for research and development of carbon/carbon composites, ceramic matrix composites, and ultra-high temperature ceramics. Introduction Carbon/carbon (C/C) composites are light weight material possess excellent thermo-mechanical properties at room temperature and at high temperatures. Thus C/C composites have been considered as the most promising material for high temperature structural applications, such as thermal protection system in space vehicles, heat resistant components in rocket nozzles, plasma-facing surface and diverter plates of the tokomak fusion reactor etc. [1-4]. The performance of C/C composite is known to depend on the types of carbon fibers, matrix precursors, weave geometry (1D, 2D or 3D), nature of bonding between the
High temperature tensile properties of 2D crossply carbon-carbon composites
Jun 17, 2023
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